JEE containers typically provide a mechanism using proprietary deployment descriptors to map external to internal user roles. That is, the application declares and uses the internal roles in web.xml and there is a file (eg weblogic.xml for weblogic) that maps the actual roles assigned to a user to the internal ones.
How can such a mapping be achieved when using Spring Security? I am using Spring Security 3.0.x.
Spring Security 3.0.x. does not provide such a mapping out of the box.
But you can implement it by your own, by extending the Authentication Provider that is used for your authentication method.
If you use a DaoAuthenticationProvider
(that use internaly a UserDetailsService
) then you can override the addCustomAuthorities(String username, List<GrantedAuthority> authorities)
method to add new/mapped roles according to the already granted once.
for example a Extended UserDetailsService
:
...
@Override
protected void addCustomAuthorities(String username, List<GrantedAuthority> authorities) {
super.addCustomAuthorities(username, authorities);
List<GrantedAuthority> additional = new ArrayList<GrantedAuthority>();
for (GrantedAuthority role : authorities) {
additional .addAll(vourMappingService.getAdditionalForRole(role));
}
authorities.addAll(additional );
}
that use the YourMappingService
in to map the roles (by adding new roles to the existing once)
public class YourMappingService
/**
* Property bases mapping of roles to privileges.
* Every role is one line, the privileges are comma separated.
*/
private Properties roleToPrivileges;
public YourMappingService(Properties roleToPrivileges) {
if (roleToPrivileges == null) {
throw new IllegalArgumentException("roleToPrivileges must not be null");
}
this.roleToPrivileges = roleToPrivileges;
}
@Override
public Collection<? extends GrantedAuthority> getAdditionalForRole(GrantedAuthority role) {
String authority = role.getAuthority();
if(authority != null) {
String commaSeparatedPrivileges = roleToPrivileges.getProperty(role.getAuthority());
if (commaSeparatedPrivileges != null) {
List<GrantedAuthority> privileges = new ArrayList<GrantedAuthority>();
for(String privilegeName : StringUtils.commaDelimitedListToSet(commaSeparatedPrivileges)) {
privileges.add(new GrantedAuthorityImpl(privilegeName.trim()));
}
return privileges;
} else {
return Collections.emptyList();
}
} else {
return Collections.emptyList();
}
}
}
configuration:
<bean id="myUserDetailsService" class="de.humanfork.springsecurityroles.impl.JdbcDaoPrivilegesImpl">
<constructor-arg ref="yourMappingService"/>
<property name="dataSource" ref="dataSource"/>
<property name="usersByUsernameQuery" value="SELECT login,encryptedPassword,loginEnabled FROM user WHERE login = ?"/>
<property name="enableAuthorities" value="true"/>
<property name="authoritiesByUsernameQuery" value="SELECT u.login, r.securityRoles FROM user u, user2security_roles r WHERE u.login= ? AND u.id = r. User_fk;"/>
</bean>
<bean id="yourMappingService" class="ZourMappingService">
<constructor-arg>
<props>
<prop key="ROLE_ADMIN">
ROLE_backend_access,
ROLE_user_mngt,
ROLE_passwordLostRequest_mngt,
ROLE_log_mngt
</prop>
<prop key="ROLE_USER">
</prop>
</props>
</constructor-arg>
</bean>
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